DOVER — Another weekend snowstorm is expected drop three to six inches of snow by the end of today on the Tri-City region, while many parts of New England remain buried by last week’s mammoth storm.

The snow is expected to fall through early this evening, and with temperatures likely being in the 20s today, icy roads will accompany the snowfall, said James Brown, hydrometeorological technician at National Weather Service in Gray, Maine.

On Saturday, Brown said snow was expected to start Saturday evening, and continue through this morning, with a possible break in snowfall overnight.

After today’s snowstorm, a low pressure system coming from the Midwest is expected to bring more snow on Tuesday or Wednesday. While today’s storm is not expected to bring rain, the storm expected for later in the week will likely be a wintry mix, said Brown, consisting of snow and sleet followed by rain.

As of Saturday night, a winter storm warning was in effect for Boston, where the National Weather Service said six to eight inches of snow could fall by Sunday night. Heavier snow — up to 10 inches — is possible on Cape Cod, Martha’s Vineyard and Nantucket. Strong winds are expected to accompany the snow, gusting up to 50 mph.

Farther north, a blizzard watch is in effect for parts of Down East and Northeast Maine, where 10 inches of snow is possible along with wind gusts in excess of 50 mph. The National Weather Service warned that whiteout conditions are likely with near-zero visibility because of blowing, drifting snow.

The storm isn’t expected to be the epic event of last week, which dropped up to three feet of snow on some areas and knocked out power to hundreds of thousands of utility customers. Cape Cod, which could get the worst of the coming storm, had between eight and 17 inches of snow in that storm.

But officials said this storm will be plenty bad enough at its peak to keep residents indoors.

Boston Mayor Thomas Menino said crews pretreated roads and plows would be working through the night, but travel could still be treacherous in the morning.

“I’m asking residents to use common sense, and stay off the roads while snowfall is heaviest tomorrow,” he said Saturday.

Meteorologist Matthew Belk said Providence can also expect six to eight inches while central Massachusetts and southern New Hampshire could get up to six inches.